In accordance with "the Agreement of the developer on propagation of products on Android Market".
2.2 You have the right to distribute Products via Android Market and can accept the Agreement only in case, if you are a certified Developer. This Agreement will automatically terminate if you find that you (a) not a certified Developer or (b) being a person who is prohibited from using Android software under the laws of the United States or any other state, including the state, which resident you are or from which you use the software Android.
Who is a certified Developer? And where issue this certificate?